This is why Ethereum founder wants to experiment with proof-of-stake (project Casper), to replace at least partially the proof-of-work: https://www.ethnews.com

This is why Ethereum founder wants to experiment with proof-of-stake (project Casper), to replace at least partially the proof-of-work: https://www.ethnews.com/proof-of-stake-vitalik-buterin-shares-casper-contract-code https://www.ethnews.com/proof-of-stake-vitalik-buterin-share...